Washing machine transmission



1952 G. w. DUNHAM WASHING MACHINE TRANSMISSION 9 Sheets-Sheet 1 Filed June 11, 1948 INVENTOR MM E MJYM w. Wm

Jan. 29, 1952 Filed June 11, 1948 G. W. DU NHAM WASHING MACHINE TRANSMISSION 9 Sheets-Sheet 2 INVENTOR 650005 HEM/m BYQZ 5/ L ATTORNEYS Jan. 29, 1952 w D NHAM 2,583,823

WASHING MACHINE TRANSMISSION Filed June 11, 1948 9 Sheets-Sheet 5 INVENTOR 6:000: Mia/Wm ATTORNEYS Jan. 29, 1952 2,583,823

G. W. DUNHAM WASHING MACHINE TRANSMISSION Filed June 11, 1948 9 Sheets-Sheet 4 9a %96 Isa Jan. 29, 1952 G. w. DUNHAM WASHING MACHINE TRANSMISSION 9 Sheets-Sheet 5 Filed June 11, 1948 M R M W mw E N N 51 W w .A W

R m GY B G. w. DUNHAM WASHING MACHINE TRANSMISSION Jan. 29, 1952 9 Sheets-Sheet 6 Filed June 11, 1948 INVENTOR 650m: Mfiww/A/v BY W ATTORNEYS Jan. 29, 1952 Filed June 11, 1948 G. W. DUNHAM WASHING MACHINE TRANSMISSION 9 Sheets-Sheet 7 INVEINTOR 6:000: Mflu/wmn BYZZ i1 9 ATTORNEYS 1952 G. w. DUNHAM WASHING MACHINE TRANSMISSION 9 Sheets-Sheet 8 Filed June 11, 1948 ATTORNEYS Jan. 29, 1952 w, DUNHAM 2,583,823

WASHING MACHINE TRANSMISSION Filed June 11, 1948 9 Sheets-Sheet 9 INVENTOR Gram: WT flu/w/An ATTORNEYS Patented Jan. 29, I952 UNITED STATES PATENT OFFICE WASHING MACHINE TRANSMISSION George W. Dunham, Westport, Conn., assignor to Savage Arms Corporation, Utica, N. Y., a corporation of Delaware Original application March 21, 1947, Serial No.

738,295. Divided and this 1948, Serial No. 32,396

This invention relates to improvements in washing machines of the spin dry type adapted for operation through the usual cycles of soaking, washring, rinsing and sprinning dry either under manual or full automatic control. -The present.

application is a division of my copending application Serial No. 736,295, filed March 21, 1947, and which issued as Patent No. 2,579,309.

The present invention embodies certain principles of operation and construction disclosed in my preveious Patent 1,842,154, January 19, 1932, and aims at the further development of this type of machine in adapting the same for automatic operation and for more efficient and satisfactory performance.

In machines of this character it is the practice to operate the clothes holder or backet at relatively low speed for washing and at relatively high speed for spin drying or centrifuging, One object of my invention is to provide an improved form of two-sped transmission for this purpose and to effect the transition from one operation to the other quickly and without shock. To this end I employ a reversible electric motor and a pair of opposed overrunning clutches which drive through one transmission when operating in one direction, and through the other transmission when reversed. Preferably the spinner shaft and its basket are driven in the same direction for both operations of the motor whereby said spinner shaft may be merely slowed down for washing and speeded up for centrifuging. Brake mechanism is preferably employed to hasten the slowing down of the spinner shaft for the transition from high speed to low speed operation.

4 Claims. (c1. 74-812) application June 11,

a trunnion bearing for this purpose and areversible switch for the motor is arranged to automatically reverse said motor when the unit is swung from one position to the other. In the present embodiment the positional shift of the columnar unit is affected by hand, but the construction is easily adapted for power operation should it be desired to convert the present machine to full automatic operation by the addition of valves, and servo-motor devices under the control of the conventional electric timer and circuits now well known in the art.

Further objects and advantages of my invention will be apparent from the following detailed description taken in connection with the accompanying drawings in which,

Fig. 1 is a side .view of the machine partly in section showing by solid lines the motor and basket assembly in spinning position and by dotted lines the same in washing position; I N

Fig. 2 is a detail section at 2--2 in Fig. 1 to show the hump in the right half bottom of the tub;

Fig. 3 is a view at right angles to Fig. 1 and partly in section along the broken line 3- 3 of Fig. 1;

Fig. 4 is a sectional view taken along line 4-4 of Fig. 1;

Fig. 5 is a detail view in vertical section through the lower end of the motor housingand showing the rubber mounting between said motor housing and stirrup. This view is along irregu- 3 lar line 5-5 of Fig. 12;

A further object of my invention is to provide a structure of the vertical axis centrifugi-ngtype which is largely self-balancing by a gyratory actionobtained by a so-called columnar unit comprising the spinner shaft with the revolving basket of clothes at the upper end thereof and with the motor and its transmissionin axial symmetrical disposition below the basket, the entire position for the low speed washing operation The entire columnar unit is pivotally hung from Fig.5 is a vertical section of the transmission at the upper end of the motorcasing;

-- Figs. 7 to 11 inclusive are horizontal sections 1 -along lines corersponding to the said figure numhers respectively in Fig. 6;

Fig. 12 is a sectional view looking down fro line [2-42 in Fig. 5;

Figs. 13 and 14. are plan and side views re-- spectively of the rubber doughnut used in the mounting at the lower end of the motor housing;

Fig. 15 is a top plan view of the machine with part of the tube topbroken away to show th upper end of the basket; and

Fig. 16 is a detail top plan view of the conical base support for the basket showing the mountin holes for receiving the basket base studs.

Referring more particularly to the drawings. the main support or cabinet for the machine indicated at l is cylindrical and has welded to its lower end a base ring 2. Caster brackets Biastened to this ring carry the usual swiveled casters l. 'A channel beam 5 extends diametrically across the open ring 2 and; as shown in-Fig. 4,

carries certain parts of the machine later to be described. The right side of the cabinet I looking at Fig. 1 is cut away with a vertical opening ii which is bridged by an outwardly bulging strap 1 extending from topv to bottom of said opening. This construction provides the accommodation for an inclined position of the motor housing as shown in dotted lines in Fig. 1. 'If the lower cabinet 1 were square, one of its corners could be suitably used for this arrangement...

In the top circular rim 8 of the cabinet I is fixedly positioned the tub indicated generally at 9 andhaving a cylindrical sidewall Hi and top rim I l definin an entrance opening and adapted to be closed by removable :eover l2. [3 indicates a grommeted finger hold in said cover by which it may be handled. If desired an encircling clamp band or hoop (not shown) may be provided adjacent rim 8 so as to firmly hold the tub in its stationary position. 1 l I i Centrally located in thebottom of the tub 9 is a radial clearance for the spinner shaft as will be later described. The tub bottom is fastened to thisbase ring and the left half l5 of said tub bottom (see, Fig. 1) is projected downwardly to form a relatively deep basin to hold Water for the usual soaking, washing and rinsing operations. The water will beintroduced through the top entrance of the tub, and will be drained through the outlet l6 by a suitable emptying pump (not shown).- The right half ll of said tub bottom slopes gently downward from the side wall it 7 an obliquely inclined base ring it which provides housing has a tubular extension 31 which projects through the opening of the stirrup foot, and the lower end of motor shaft 38 is supported in an annular ball bearin as, carried in said motor casing as shown in Fig. 5. Upon the upper end of said motor housing is fastened the transmission casing within which the transmission is mounted and the spinner shaft 24 and motor shaft 38 extend into said casing it in end toend coaxial relation as shown in 'Fig. 6. The upper projecting portion of the motor shaft 33 is supported in the annular ball bearing 38s: at the top ing. As shown in Fig.5, the lower tubular extension 31 from-the motor housingis'encircled by two doughnut-shaped rings of rubber or similar resilient material indicated at :22 and 43. Both these doughnut rings are alike and having the shape and configuration shown in Figs. 13 and 14. As therein shown, each doughnut such as $2 has a cutpart way into its upper side, slots M, and out part way into its lower side similar slots t5 which toward the deep basin 15 so as to drain thereinto, and is hump l8 as shown in Fig. 2 to provide accommoelation for the inclined position of the motor housing indicated in dottedlines in Fig. 1.

A clamping ring it secures'the inner peripheral edge of the tub bottom to its base ring It by means of screw studs 26. This clamping means l9 also secures for a seal'tight joint the lower 7 edge of a flexible rubber boot 2|, the upper edge of which is securely fastened by a seal tight joint I to the upper end of a tubular neck extension 22 formed" with a'radially' extending .from the transmission case 40, which extension provides a bearing for the spinner shaft 24.. The boot 2| thus closes the radial clearance space between the base ring it and intersecting spinner shaft in all positions of said shaft. At the left side of the clamping ring IS a vertically disposed integral shoulder 25 serves as a resting abutment V for the neck 22 when the columnarunit is in its inclined position as shown in dotted lines in Fig. 1. The base. ring M has' integral with its lower side apair of'bearing lugs 25 and-21 (see Fig. 3). A dependent hangin stirrup formed with side arms 28 and 29 has at the upper end of said arms stirrup trunnions 30 and 3t which are pivotally hung in said bearing lugs 26 and 21. The lower end of said stirrup arms 28 and 29 arewelded to opposite sides to a stirrup foot ring 32 which has an upwardly flanged rim to which said side arms I U are joined and a central opening through which "a; lower extension of the motor casing extends as will be described: A depending U-shaped strap 33 is also welded'to the flange of the stirrup foot32 and the bottom of this strapcarries fixed thereto adownwardly projecting pin 34 which serves for, retaining the stirrup and'its supported parts in difierent positions as will be described.

The sosc'alled columnarunitof the machme, in-

dicatedgenerally at 35, comprises a'motor housing 3 6 containingan electric motorof the IBVGISie ble type (not shown Thelower end of Said are in staggered relation with those on the upper side. These doughnuts i2 and stare positioned respectively above and below the foot ring 32 of the stirrup. Bent down ears do from said foot ring 32 embrace the .outer side oflower doughnut 43 to hold the same in position, and bent up tongues 41 from said foot ring 32 engage in the 7 lower slots 45 of the upper doughnut 4': to retain the same. Also integral 'tongue-likerwebs 48 are projected downwardly from the lower end of the motor housing at intervals to engage in the upper slots 44 of the upper doughnut 32, all as shown in Fig. 5. A retaining annulus 49 is located below the lower doughnut i3 and is held in position by an end nut 5i! and snap lock ring 5!;

It will be noted that while no parts project into the slots of the-lower doughnut 43, this doughnut ismade similar in shape and construction to the upper doughnut simply for convenience of assembly.

The stirrup '28, 29 carrying the columnar unit 35 as described, is adapted to be swung on its trunnions 30, 3| from the vertical position shown in solid lines to the inclined position shown in dotted lines of Fig. l and retaining means, as hereinafter described; are provided to firmly hold the stirrup in either of said positions. When the columnar unit is in its inclined position, the hasket 4l will have substantially one half thereof immersed in the water filled basin l5 as indicated by dotted lines in'Fig. 1. This is the washing'position for the basket and it will be understood that the spinner shaft 24 will be operated at the relative slow speed customary for such operation. The vertical position of basket 42 shown in solid lines of Fig. l is its spin'dry position, and

for this centrifuging operation the spinner shaft 7 will-be operated at relatively high speed as is well understood; During the spin dry operation the washing water will have been emptied from basin I5 and the latter will serve as a drainage sump for said spin drying. i

As shown in Fig; l the bottom channel beam 7 5 is provided with a lock pin slot 52. When the columnar unit 35 is in vertical position the looking pin 34 is adapted to be engaged and locked in this slot by a latch 53 forming part of a latch lever 54 pivoted at 55 on said channel beam 5. Similarly when the columnar unit is tilted to its inclined position, as shown in dotted lines in Fig. 1, the locking pin 34 is locked in a slot 56 in the side wall strap I by means of a latch 51 pivoted at 58 on said side strap 1. A foot treadle lever 59 is pivoted at 60 upon the channel beam 5 (see Fig. 1) and is connected by a link 5| to the latch lever 54. The latter is connected by link 62, bell crank lever 63, and link 64 to the latch 51 whereby both of said latches may be simultaneously thrown to open or unlocking position by stepping on said foot treadle 59. A spring 65 is connected between the foot treadle lever 59 and the channel beam 5 in the manner shown in Fig. l, and another spring 66 is connected between the strap 1 and the latch 51 shown in Fig. 4, whereby both of said springs act in a, manner to yieldingly hold said latches 53' and 51 in their closed or locking positions. The latches are so formed that the locking pin 34 when moved into its respective slots 52 or 56 will automatically cam the latches 53 or 51 out of the way so as to be locked thereby.

Counterbalancing spring means are arranged for substantially carrying the weight of the columnar unit 35 when in its inclined position and also for imparting a slight thrust upon said unit in moving it home to its vertical position. This spring structure is duplicated at opposite sides of the stirrup and comprises (see Figs. 1 and 3) a strut rod 61 pivoted at its upper end to the stirrup side arm 28 below trunnion 3i] and having its lower end slidable through a thim ble 68 swivelly held in bracket 69 fastened to the channel beam 5 at the position shown. A coiled compression spring is positioned between stop abutment H on said rod 51 and the thimble 58 so as to impart an upward thrust on rod 61. When the columnar unit is swung to its inclined position the line of thrust of said spring assembly for supporting the columnar unit is indicated by the dot dash line 12 in said Fig. 1.

A reversing switch for the motor of the conventional type is indicated at 13 as being fixed to the side arm 28 of the stirrup. The cable of the electrical circuit leads from the outside power source to the switch is indicated at 14 and the cable for the circuit leads into the motor is indicated at 15. This reversible switch 13 has a spring pressed plunger 16 which is normally pro- ,iected to its outer position for closing circuits to operate the motor in one direction and when pressed to its inward position it changes the circuits for reversing the motor in a well understood manner. A switch bracket abutment 11 is fixed to the channel 'beam 5 (see Fig. 4) in posi tion so that when the stirrup and its columnar unit is swung to vertical position, as shown in Fig. 1, the switch abutment 11 will press against the plunger 16 and close the circuits for operating the motor in the direction for operating through its high speed transmission. When the stirrup and columnar unit are swung away from the vertical position, plunger 16 of switch '13 will move outwardly and close the circuits for reversing the motor so as to operate through its low speed transmission.

The upper portion of the motor shaft 38 projects from its motor housing part way through the transmission housing as shown in Fig. 6.

The spinner shaft 24 is positioned above and in end to end coaxial relation with said motor shaft and is rotatably mounted in sleeve bearings within the neck tube 22 projecting upwardly from the transmission casing 40. A reduced lower end of said spinner shaft 24 carries an end bearing stud which rests on a ball ill carried in the upper end of the motor shaft 38.

The two-speed transmission between the motor shaft 38 and spinner shaft 24 is shown more particularly in Figs. 6 to 11 inclusive, and comprises an arrangement of differential planetary gearing which may be described as follows. A motor shaft pinion 82 keyed to the motor shaft 33 meshes with intermediate pinion 83, the latter meshing with a stationary ring gear 84 in the manner of an epicyclic gear train wherein the pinion 83 has an orbital travel around the ring gear 84 fixed to the motor housing by locking pins 85. The intermediate pinion 83 is integral with a similar pinion 86 above the same (except that pinion 86 ha more teeth than pinion 83), and both said pinions 83 and 86 are rotatably mounted on a stud shaft 81 carried in a rotatable spider disk 86. The latter is fixed by key 89 to an inner sleeve 90 rotatable on the upper end of the motor shaft 38 through suitable bearing bushings. The pinion meshes with a movable ring gear 9| formed at the lower end of an outer rotatable sleeve 92. It will be observed that the pinion connections just described are duplicated on the othe'rside of the motor shaft, and that the entire transmission mechanism is symmetrically disposed around the axis of said motor and spinner shafts. I

A clutch driven member 93 of stepped tubular formation is carried with its smaller diameter portion upon the lower reduced end of the spinner shaft 24 by a pin and slot connection indicated at 94 and 95 which allows a limited relative rotative movement between member 53 and the spinner shaft but does not permit vertical movement therebetween. An overrunning roller clutch for the low speed drive is mounted between the outer sleeve 92 and the aforesaid smaller end of the clutch driven member 93. As shown in Fig. 10, this overrunning clutch comprises the wedge member 96 fixed by key 91 to the clutch driven member 93 and is formed with the usual wedge pockets to receive the rollers such as 98 and roller backing springs such as 99, which rollers coaot with a bearing ring I00 fixed to outer sleeve 92 by vertical pins 920.. It will be observed that this clutch of Fig. 10 will be active for driving the spinner shaft only when the outer sleeve 92 is rotated in anti-clockwise direction, looking down at Fig. 10. As will be later pointed out this is the low speed transmission drive.

A similar overrunning roller clutch for the high speed drive, arranged in opposed relation to that of Fig. 10, is mounted between the interior enlarged end of the clutch driven member 93 and the outside of inner sleeve member 90. As shown in Fig. 11, this latter clutch comprises the wedge member llll formed integral with the inner sleeve and has the usual pockets for its rollers I02 and roller backing springs I03, which rollers coact with the inside of the enlarged end of the clutch driven member 93. Itwill be observed that said clutch driven member 93 will be driven by this latter clutch shown in Fig. 11 only when the inner sleeve member 90. rotates in its anti clockwise direction, and that both said clutches of Fig. 10 and Fig. 11 serve todrive the spinner shaft in an anti-clockwise direction. The transrotates anti-clockwise.

The action of the'foregoing transmission and clutch'drives may be briefly reviewed as follows: When the motor shaft 38 rotates clockwise (looking down from the top), the pinion 52 meshing with lower pinion 83 causes the latter to travel in a'clockwise direction around the fixed internal gear 84, see Fig. 7. Thestud shaft 8'! of said pinion 83 since it is carried in the spider disk 88'will thus cause the latter to rotate clockwise whereby the upper pinion 86 will also travel clockwise in engagementwith its movable gear ring 9!, .see Fig. 9. The ratio of gear teeth in lower pinion 83 and fixed ring gear t l is greater than the ratio of gear teeth between upper pinion 8t and its movable ring gear 9i. In consequence of this differential ratio, one complete orbital travel through 360? of lower, pinion 83 with its spider 88 carries the upper pinion 85 also through an orbital travel of 360 but without completing a circuit on its movable ring gear 9i. Since the ring gear 84 is fixed, the movable ring gear 9 is compelled tomove backward or anticlockwise relative to said fixed gear 84 during the clockwise orbital travelof the pinions 83 and 85. The movable ring gear 9| thus being moved anticlockwise carries the outer sleeve 92 in an anticlockwise direction, while the motor shaft as above stated is rotating clockwise. The anticlockwise rotation of said outer sleeve 92 will activate the upper clutch shown in Fig. 10, and thus drive the clutch driven member 93 in an anti-clockwise direction; The member 93 is con- 7 pled directly to the spinner shaft 24 by rneans rendered idle by the upper overrunning clutch of Fig. 10. But the clutch drivenmember 93 and its spinner shaft will be driven at relatively higher speed by the transmission which may be traced as follows: The anti-clockwise rotation of motor shaft pinion 82 will cause the orbital travel ofthe lower pinion 83 and rotation of spider 38 in an anti-clockwise direction. keyed to the inner sleeve 90 whereby the latter will also rotate in an anti-clockwise direction.

It will be clear from Fig. 11, that when this sleeve fill rotates anti-clockwise it activates the lower roller clutch so as to cause the samevto drive the inside enlarged end, of the clutch driven member 93. The latter member is coupled to the spinner shaft as previously stated, and thetrans-' mission just described will thus rotate the spinner 93. This action will occur whenever the high speed transmission begins to slow down preparatory to a reversal of the motor shaft.

Referring to Fig. 6, a cone surface brake member I84 has a splined connection at I05 to the upper end of the clutch driven member 53 so as to have a short vertical movement thereon. A coacting brake surface I06 is formed on the inside of the gear casing to coact with said cone brake I04. Raising of the cone member I04 brings the braking surface into contact, and the lowering of said member I64 releases the brake. Directly above the brakemember is a'coupling member ill! which has a sleeve portion surrounding the lower end of the spinner shaft 24 and is provided with an inclined cam slot I08 in one side of said sleeve into which extends a pin lil9 fixed to the spinner shaft 24. The coupling member III! has a lower flange portion I II! from which stud bolts. III project through the cone brake I04 for connection to a brake lifter ring H2. A

spring annulus 'I I3 is interposed between the brake lifter ring H2 and the cone brake member I04.

In this manner the brake member W4 is lined rotatively to clutch driven member 93 and its associated coupling member I6! has a lost motion connection rotatively with respect to said spinner shaft 24 which causes a vertical shift of said coupling and brake member dependent on the relative rotation of said parts. The pin and slot connection at $4 and 95 prevents vertical movement of said spinner shaft 24. From this construction it will be appreciated that when the spinner shaft 24 tends to overrun the clutch driven member 93 the pin I09 will cam the coupling member Ill! upwardly and through the brake lifter '2 will cause the cone brake I {i4 to grip the surface lflfi'and slow down therotation of said spinner shaft. Similarly when the clutch driven member 93 is driving the spinner shaft 24 through coupling member III? the cam Ell The spider 88 is shaftin an anti-clockwisedirection at its relatively high rate of speed for centrifuging.

At the end of a spin dry or centrifuging operation with. the spinnershaft rotating at relatively high speed, it"is'desirable to slow down the rotation of this spinner shaft quickly preparatory to rotating the same at lower speed for the washing operation, and for this. purpose I have provided automatically acting brake mechanism which also serves as the coupling means between the clutch driven member 93 and the spinner shaft '24. The brake mechanism acts to slow down the spinnershaft 2 4 whenever the latter tends to overrun the clutchdriven member spinner shaft are rotatively united.

slot I08 will move the coupling member downwardly to release the brake. V

I The spinner basket 4| is of the general kidney shape formation as disclosed in my previous patent referred to and has the usual perforations in the side wall thereof. The reentrant shaped bottom of said basket has centrally located therein a fiat disk portion H4 formed with an axial hollow stem I I5 closed at the top which is adapted to snugly and removably fit upon the upper extended portion of the spinner shaft 24 as shown in Fig. 1. V The spinner shaft has fixed. thereto a basket support H6 of frusto-conic shape having top table portion II'I upon which the basket bottom disk n4 is adapted to rest. As shown in Figs. 1 and 16 the table I I1 is provided with holes H8 and bottom disk I I 4 is provided with co-fitting driving pegs H9 whereby the basket and If desired the basket support H6 may be appropriately weighted with some heavy material to assist in ner shaft.

The spinner basket is also preferably divided stabilizing the high speed rotation of said spin-' basket. These wings are designed to prevent any tumbling of the clothes out of the basket while being rotated in its inclined position. The purpose of dividing the basket into two equi-sized compartments as described is to facilitate a more equal distribution of the clothes therein at each side of the rotating spinner shaft particularly for the high speed operation of centrifuging.

What I claim is:

1. In a washing machine in combination, a tub, a basket, a rotatable spinner shaft upon which said basket is carried for rotation in said tub, a clutch driven member having a lost motion driving connection with said spinner shaft a reversible motor shaft in coaxial relation to said spinner shaft, a low speed transmission comprising an overrunning clutch acting to drive said clutch driven member in one direction when the motor shaft rotates in one direction, and a speed transmisison comprising an overrunning clutch acting to drive said clutch driven member in the same direction when said motor shaft rotates in the reverse direction, both of said transmissions being symmetrically disposed around the axis of said shafts.

2. In a washing machine in combination, a tub, a basket, a rotatable spinner shaft upon which said basket is carried for rotation in said tub, a clutch driven member connected to said spinner shaft, a reversible motor shaft, a low speed transmission comprising an overrunning clutch acting to drivesaid clutch driven member in the same direction when the motor shaft rotates in one direction, and a high speed transmission comprising an overrunning clutch acting to drive said clutch driven member in the same direction when said motor shaft rotates in the reverse direction, a brake mechanism and means automatically making the same effective to slow down said spinner shaft when the motor shaft decelerates preparatory to a reversal in its direction of rotation.

3. In a washing machine in combination, a tub, a basket, a rotatable spinner shaft upon which said basket is carried for rotation in said tub, a clutch driven member having a lost motion driving connection with said spinner shaft, a reversible electric motor, a low speed transmission comprising an overrunning clutch acting to drive said clutch driven member in one 1 direction when the motor operates in one direction, a high speed transmission comprising an overrunning clutch acting to drive said clutch driven member in the same direction when said motor operates in a reverse direction, and a reversing switch for said motor to selectively operate either of said transmisisons, a brake mechanism and means automatically making the same effective to slow down said spinner shaft when the motor is reversed to change from the high speed transmission to the low speed transmission.

4. In a washing machine in combination, a tub, a basket, a rotatable spinner shaft upon which said basket is carried for rotation in said tub, a reversible motor shaft, a low speed transmission comprising an overrunning clutch acting to drive said spinner shaft when the motor shaft rotates in one direction, and a high speed transmission comprising an overrunning clutch acting to drive said spinner shaft when said motor shaft rotates in the reverse direction, a brake mechanism and means automatically making the same effective to slow down said spinner shaft when the motor shaft decelerates preparatory to a reversal in its direction of rotation, said brake mechanism comprising a brake shoe and a coupling member carrying said brake shoe, said coupling member being rotatively driven from said transmissions, a lost motion connection between said coupling member and spinner shaft comprising a pin and cam slot which operates said brake shoe upon relative movement between said coupling member and spinner shaft.

GEORGE W. DUNHAM.

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